Extech Instruments DO210 Manuale utente

UserGuide



DissolvedOxygenMeter

ModelDO210



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DO210-en-GB_v1.2 11/14

Introduction

ThankyouforchoosingtheExtechDissolvedOxygen/TemperatureMeterwhichsimultaneously

displaysDissolvedOxygenandTemperatureorOxygeninairandTemperature.Unitsofmeasure

aremg/lforDissolvedOxygen,%forOxygeninair,andoC/oFfortemperature.Oxygenis

measuredwitharemotesensorthatalsocontainsathermistorformeasuringairtemperature.

Advancedfeaturesincludealtitudeand%saltcompensation,datahold,autoshutoff,and

Min/Maxrecording.



MeterDescription



1. Maindisplaydigitsformeasurementsandprogrammingvalues

2. Temperaturereading

3. Power/Escapebutton

4. Function/Hold/Uparrowbutton

5. Record/Enterbutton

6. Setting/Downarrowbutton

7. BatteryCompartment(onback)

8. Probeconnectingcable

9. Probe



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DO210-en-GB_v1.2 11/14

GettingStarted

Note:Thedissolvedoxygenprobeassemblymaybeshippedfromthefactorydry.Ifthe

probedoesnotcontainelectrolytesolution,refertotheElectrolyteReplacementsection

belowforinformationonaddingtheelectrolytesolutionpriortoinitialuse.

FillingtheElectrolyteContainerPriortoInitialUse

1. Unscrewandremovetheelectrolytecontainerfromthetipof

theprobe.

2. Filltheelectrolytecontainerwithnewelectrolyte.

3. Screwtheelectrolytecontainerbackontotheelectrodeholder

andprobehandle.ExcessElectrolytemaybeforcedout

throughthethreads.Wipeclean.

4. Lightlytaptheprobetoremoveairbubbles.



Calibration

Forfirsttimeuseorafterlongperiodsofnon‐use,calibratetheinstrumentusingtheprocedure

below.Theprocedureshouldbeperformedinanopen,well‐ventilatedarea.

1. Connecttheoxygenprobeplugtotheprobeinputsocket.

2. SwitchONthemeterbypressingthePower/ESCbutton.

3. Thelowerdisplayshouldindicatethe%O2unitsymbolandatemperaturevalue.

4. Theupperdisplaywillbeginfluctuating.Waitapproximately3minutesfortheupper

displaytostabilize.

5. PresstheHOLDbuttonandthedisplaywillshowtheHOLDicon.

6. PresstheRECbutton.Thedisplaywillshow"CAL"flashingandthemeterdisplaywill

begincountingdownfrom30tozero;themeterwillthendisplaytheENDicon.

7. Theupperdisplaywillshowavalueapproximately20.9or20.8(typicalconcentrationof

oxygeninair).

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DO210-en-GB_v1.2 11/14

DissolvedOxygen(DO)Measurements

MeasurementPreparation

Beforetakingmeasurements,performthecalibrationdescribedaboveifnecessary.

TakingMeasurements

1. PressandholdtheFunctionbuttonforatleast2secondstochangefrom%O2tomg/Lor

frommg/Lto%O2.ForDOmeasurementsselectmg/L(milligramsperliter).

2. Immersetheprobeinthesolutionundertest.Foroptimumautomatictemperature

compensation,immersetheprobetoadepthofatleast4"(10cm).

3. Waituntilthedisplaystabilizes.

4. Thevelocityoftheliquidcomingintocontactwiththeprobemustbeatleast0.6to1

ft/min(0.2to0.3m/s).Ifthesolutionisstanding,stirthesolutionwiththeprobeoruse

anagitator.

5. Rinsetheprobewithcleanwateraftereachuseandcovertheprobeheadwiththe

probeheadprotectivecover.

OxygeninAir(%O2)Measurements

MeasurementPreparation

Beforetakingmeasurements,performthecalibrationdescribedearlierifnecessary.

TakingMeasurements

1. PressandholdtheFunctionbuttonforatleast2secondstochangefrommg/Lto%O2if

necessary.Foroxygeninairmeasurementsbesuretoselect%O2.

2. Holdtheprobeintheareaundertestandwaituntilthedisplaystabilizes.

TemperatureMeasurements

Thelowerdisplaywillindicatethetemperatureofameasuredsolutionorthetemperatureof

theair(dependingonwhattypeofmeasurementtheuserisperforming).Tochangethe

temperatureunitofmeasureoC/oFfollowtheprocedurebeloworrefertotheSettingsmode

section:

PressandholdtheSettingbuttonfor5seconds(untilabeepisheard)toaccessthe

Settingmode

PresstheSettingbuttonmomentarilytwomoretimes

UsetheUParrowbuttontoselectoCoroFtemperatureunits

PressENTERtosavethesettingandpressESCtoreturntothenormalmodeofoperation



DataHold

PresstheHoldkeytofreezethedisplayedvalue.TheLCDwilldisplayHOLDalongwiththeheld

reading.PresstheHoldkeyagaintoreleasethedataholdfunction.



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DO210-en-GB_v1.2 11/14

MIN/MAXDataRecording

Whenselected,theDataRecordingfunctionrecordstheMin/Maxreadings.Tostartadata

recordingsession:

1. PresstheRECbuttononce.TheRECindicatorwillappearonthedisplay.PresstheREC

buttonagainandRECMAXwilldisplayonthescreenalongwiththemaximumvalue.

2. PresstheRECbuttonagainandthedisplaywillshowRECMINandtheminimumvaluewill

bedisplayed.

3. ToreleasetheheldMAXorMINreading,presstheHOLDbuttonwhileeithertheRECMAX

orRECMINiconsarevisible;nowonlytheRECiconwillbevisible.Themeterisnow

continuingtomonitorthehighest(MAX)andlowest(MIN)readingsbutisdisplayingreal

timemeasurements.ToviewtheMAXandMINvaluesagainusetheRECbuttonas

describedearlier.

4. ToexittheRecordmode,pressandholdtheRECbuttonforatleast2seconds.Thedisplay

willreturntothenormaloperatingmode.



SettingsMode

BeforeaccessingtheSettingsmodeensurethatthemeterisnotintheHOLDorMIN/MAX

Recordingmodes.TousetheSettingsmode:

1. PressandholdtheSETTINGbuttonforatleast5seconds(untilabeepisheard)

2. UsetheSETTINGbuttontoscrollthroughtheSettingsoptionsTheoptionsare:

HIGH Altitudecompensationadjustment

SALt  %Saltadjustment

°C/°F Temperatureunitselection

OFF  Autopoweroffmanagement

3. RefertothefollowingsectionsfordetailedinstructionsonprogrammingtheSetting

modeparameters

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DO210-en-GB_v1.2 11/14

AltitudeCompensationAdjustment(HIGH)

Ifthemeasurementenvironmentisnotatsealevelthealtitude(HIGH)valuemustbe

adjustedasdescribedbelow:

1. PressandholdtheSettingsbuttonfor5seconds(untilabeepisheard);themeter

willthendisplaythewordHIGHonthelowerleftandthealtitudecompensation

valueintheupperLCDareainlargerdigits

2. PressENTERandtheHIGHsymbolwillflash

3. Usethe▲and▼buttonstosetthedesiredaltitudecompensationinmeters

4. AfterselectingthedesiredvaluepressENTERtosaveandtosteptotheSalt

compensationparameter(orpressESCtoreturntothenormaloperatingmode)

5. Notethatthealtitudecompensationcanbeadjustedfrom0to3900meters;when

themeterispoweredOFFthevaluewillrevertto0meters(sealevel)

%SaltAdjustment

1. ContinuingfromtheprevioussectionintheSettingsmode:WhentheLCDshowsSALt

atthelowerleft,presstheENTERbutton

2. TheSALtsymbolwillflashandthedisplaywillshowthesaltcompensationvalueon

theupper,largeLCDdigits

3. Usethe▲

and▼

buttonstoadjustthedisplaytothedesired%SALtvalue

4. PressENTERtosavethedataandtosteptothenextparameter(orpressESCto

returntothenormalmodeofoperation)

5. The%saltvaluecanbeadjustedfrom0to39%salt(%weight).Whenthemeteris

poweredOFFthesaltvaluewillrevertto0%salt.

TemperatureUnitsSelection

ContinuingfromtheprevioussectionintheSettingsmode:

WhenoCoroFisdisplayed,pressthe▲buttontoselectthedesiredunits.PressENTERto

savetheselectionandtosteptothenextparameter(orpressESCtoreturntothenormal

modeofoperation).

AutoPowerOFFEnable/Disable

ContinuingfromtheprevioussectionintheSettingsmode:

WhenOFFYESorOFFNOisdisplayed,usethe▲buttontoselectYESorNO.

YES:AutopowerOFFenabled(meterwillautomaticallyswitchoffafter10minutesof

inactivity;NO:AutopowerOFFdisabled.

PressENTERtosavetheselectionandtoreturntothenormaloperatingmode.



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DO210-en-GB_v1.2 11/14

BatteryReplacement

The9Vbatterythatpowerstheinstrumentrequiresreplacingwhenthebatteryiconflasheson

thedisplay.Toreplacethebatteryfollowthestepsbelow:

1. Disconnecttheprobefromtheinstrument.

2. OpentherearbatterycompartmentusingascrewdrivertoremovethetwoPhillipshead

screwsthatsecurethecompartment.

3. Carefullyremovetheoldbatteryfromthecompartmentlidchamberandgentlyunsnap

thebattery’sterminalsfromthewired(red/black)connectors.

4. Installanew9Vbatterybysnappingthebatteryterminalsontothewiredconnectors

(observingcorrectpolarity)andinsertingthebatteryintothecompartmentlidchamber.

5. Installthecompartmentlidchamberintothemeterhousingandsecurewiththetwo

screws.



Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.

Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate

collectionsites,theretailstorewherethebatterieswerepurchased,orwherever

batteriesaresold.

Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuserisobligatedtotake

end‐of‐lifedevicestoadesignatedcollectionpointforthedisposalofelectricalandelectronic

equipment.



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DO210-en-GB_v1.2 11/14

ProbeHeadReplacement

Theprobehead(onthetipoftheprobe)holdsathinTeflon®membraneandanelectrolyte

container.Calibrationerrorsorreadingerrorscouldindicatelossofelectrolyteora

dirty/damagedmembrane.Themembraneisverydelicateandcaneasilybedamagedifit

comesincontactwithsolidobjects.ReplacementprobeheadsareavailablefromanExtech

distributor.

Replacementprocedure

1. Unscrewtheprobeheadandemptytheoldelectrolytefromthecontainer.

2. Fillthenewprobehead/electrolytecontainerwithelectrolyte.

3. Screwtheprobeheadontotheprobehandle.Excesselectrolytemaybeforcedoutthrough

thethreads.Wipeclean.

4. Lightlytaptheprobetoremoveanyairbubbles.

1. Probehandle

2. Temperaturesensor

3. ProbeHead



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DO210-en-GB_v1.2 11/14

Specifications

GeneralSpecifications

CircuitCustomone‐chipLSImicroprocessorcircuit

DisplayDualfunctionLCD

MeasurementsDissolvedOxygen%O2ormg/l(milligramsperliter);Oxygen

inair:%;Temperature:°C/°F

DataholdDataholdkeyfreezesdisplayedreading

SensorStructureRemotePolarographicDissolvedOxygenSensor

Temperaturesensor:Precisionthermistor

DatarecordingMin/Maxmemoryandrecall

AutopoweroffMeterturnsoffafter10minutes(canbedisabled)

Samplerate1.0Second(approx.)

OperatingconditionsTemperature:0to50°C(32to122°F);Humidity:<80%RH

Batterypower9Valkalinebattery

PowerConsumptionApprox.6.2mADC

Weight446g(0.98lbs.)includingbatteries&probe

DimensionsMaininstrument:135x60x33mm(5.3x2.4x1.3")

Probe:190x28mm(7.5"x1.1")length/diameter



ElectricalSpecifications

MeasurementRangeResolutionAccuracy

DissolvedOxygen0.0‐20.0mg/L0.1mg/L+0.4mg/L

Oxygeninair0‐100%O20.1%O2+0.7%O2

Temperature

(probeonly)

32to122oF

0to50oC

0.1oF/C±1.5oF

+0.8oC

Compensation

adjustments

Temperature(automatic)0to50oC(32to122oF)

Salt0to39%

Altitude0to3900meters



Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

www.extech.com





www.GlobalTestSupply.com

Find Quality Products Online at: sales@GlobalTestSupply.com

Indice

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Extech Instruments MA120 Manuale utente

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